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regular shapes planes area angles matrices coins coordinates rectangles symmetry chalkdust crossnumber arrows integration taxicab geometry logic addition digital clocks star numbers floors dice hexagons ave multiples dodecagons wordplay geometric means square roots spheres doubling multiplication square numbers percentages circles integers triangles time clocks games sport squares albgebra probabilty routes cryptic crossnumbers parabolas decahedra calculus factors surds binary perimeter pascal's triangle dates partitions menace elections balancing division ellipses bases perfect numbers means tournaments consecutive integers 2d shapes tiling quadratics expansions probability sum to infinity dominos chocolate people maths indices averages functions graphs odd numbers complex numbers cards money sequences geometric mean speed crosswords combinatorics folding tube maps christmas advent crossnumber digital products 3d shapes even numbers unit fractions mean gerrymandering fractions shapes proportion shape pentagons number polygons polynomials sums products trigonometry grids consecutive numbers colouring geometry numbers determinants differentiation tangents prime numbers irreducible numbers scales crossnumbers median the only crossnumber range cubics quadrilaterals rugby axes lines cube numbers volume chess remainders cryptic clues triangle numbers digits algebra palindromes factorials sets books